Blind-fastener.



Patented Nov. 6, I900.

C. E. TEFFT & J. MCGOWAN.

BLIND FASTENER. (Application med July 12, 1900.)

(No Modal.)

aWMA-r -r Y limiten Fratte .traint ritten.,

CHARLES E. TEFFT AND JOSEPH MCGOVVAN, OF IAVTUCKET, RHODE ISLAND; SAID MOGOVAN ASSIGNOR TO SAID TEFFT.

BLlND-#IFASTENER SPECIFICATION forming part of Letters Patent No. 661,460, dated. November 6, 190.

Application filed July 12,1900. Serial No. 28,356. KNO model.)

To all w/to'nt ift may 0012.067075:

Be it known that we, CHARLES E. TEFFT and JOSEPH MCGOWAN, of Pawtucket, in the State of Rhode lsland, have invented a new and useful Improvement in Blind-Fasteners, of which the following is a specication.

Ourinven tion consists in the improved construction and arrangement of claspingsprings for holding the blind in position, as hereinafter fully set forth.

In the accompanying drawings, Figure l represents a detail elevation showing a portion of a window and a blind provided with our improved blind-fastener. Fig. 2 represents a horizontal section taken in the line 2 2 of Fig. l. Fig. 3 represents a top view of the screw-threaded holder and claspingsprings removed from the blind. Fig. et represents an end View of the screw-threaded holder for the clasping-springs. Fig. 5 represents the opposite end View of the same. Fig. 6 represents a side View of one of the clasping -springs. Fig. 7 represents a top view of the post to be placed upon the window-sill for engagement with the claspingsprings. Fig. S represents a side View of the same. Fig. 9 represents a top view ofthe engaging post to be attached to the side of the house at the back of the blind. Fig. l0 represents a side View of the same.

In the drawings, A represents the window, and B a window-blind provided with a cylindrical perforation a, into which is screwed the screw-threaded holder C for the claspingsprings D D, which are held side by side in the narrow groove b of the said holder, the said springs being oppositely curved at their ends to form claspingjaws, which are adapted to engage with the oval or elliptical post E,

secured to the window-sill F by means oi a screw c, and the oval or elliptical head of the post G, which is secured to the side I-I of the building by means of the screw-shank d. When the blind B is closed, the spring-jaws e will pass over and tightly clasp the post E, thus holding the blind lirinlyin its closed posi tion, and when the blind is pushed outward the spring-jaws e will be forced away from the post E and the spring-jaws fwill pass over and clasp the head g of the post G to hold the blind in its opened position. The screwthreaded holder O is shown in Figs. 3 and t as made in one piece; but the same may be made in two parts, as indicated by the dot ted line, if preferred.

We claim as our inventionl. In a blind-fastener, the combination of a cylindrical externally-screw-threaded casing, a longitudinal slot extending through said casing, and a catch having spring-holding jaws and longitudinallyextended parallel Shanks, said shanlcs fitting within the longitudinal slot in the casing, and being held in place by the latter, as described.

2. In a blind-fastener, the combination of a cylindrical externally-screwthreaded casing, provided at each of its opposite ends with a catch formed of two oppositelycurved spring-clasping jaws, said jaws being turned toward each other at their outer portions to form a retaining-space between them, and adapted for frictional engagement with a post or keeper, substantially as described.

CHARLES E. TEFFT. JOSEPH MCGOVVAN. Witnesses:

SOCRATES SoHoLEIELD, JOHN S. LYNCH. 

